Iraqi army soldiers march during a graduation ceremony after their training by U.S. special forces in Muqtadiyah in Diyala province July 24, 2008. Sunni Islamist al Qaeda has sought to stoke tensions in Iraq's ethnically and religiously mixed northern cities, such as Diyala and Mosul, after military campaigns pushed its militants out of former strongholds in western Anbar province and Baghdad. REUTERS/Damir Sagolj (IRAQ)